Cancel prerenders for pages that call window.print()

chrome/browser/prerender/prerender_manager.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/prerender/prerender_manager.h"
 
 #include <string>
 
 #include "base/logging.h"
 #include "base/metrics/field_trial.h"
@@ skipping 341 matching lines @@
 
     if (has_child_id && has_route_id &&
         child_id == child_route_id_pair.first &&
         route_id == child_route_id_pair.second) {
       break;
     }
   }
   return it;
 }
 
-void PrerenderManager::DestroyPreloadForChildRouteIdPair(
+bool PrerenderManager::DestroyPreloadForChildRouteIdPair(
     const std::pair<int, int>& child_route_id_pair,
     FinalStatus final_status) {
   DCHECK(CalledOnValidThread());
   std::list<PrerenderContentsData>::iterator it =
       FindPrerenderContentsForChildRouteIdPair(child_route_id_pair);
   if (it != prerender_list_.end()) {
     PrerenderContents* prerender_contents = it->contents_;
     prerender_contents->Destroy(final_status);
+    return true;
   }
+  return false;
 }
 
 void PrerenderManager::DeleteOldEntries() {
   DCHECK(CalledOnValidThread());
   while (!prerender_list_.empty()) {
     PrerenderContentsData data = prerender_list_.front();
     if (IsPrerenderElementFresh(data.start_time_))
       return;
     prerender_list_.pop_front();
     data.contents_->set_final_status(FINAL_STATUS_TIMED_OUT);
@@ skipping 519 matching lines @@
   return prerendered_tab_contents_set_.count(tab_contents) > 0;
 }
 
 bool PrerenderManager::WouldTabContentsBePrerendered(
     TabContents* tab_contents) const {
   DCHECK(CalledOnValidThread());
   return would_be_prerendered_tab_contents_set_.count(tab_contents) > 0;
 }
 
 }  // namespace prerender